<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title></title>
<link rel="stylesheet" href="./css/base.css">
<script src="./js/codergege.js"></script> 
<script src="./js/2.js"></script>
<style>

.active { background: red; }
#tab div { width:100px; height:100px; border:1px solid #ccc; 
	display:none;}

</style>
</head>
<body>
<div id="tab">
	<input type="button" value="1" class="active">
	<input type="button" value="2">
	<input type="button" value="3">
	<div id="div1" style="display:block"></div>
	<div id="div2"></div>
	<div id="div3"></div>
</div>
</body>
</html>

